Carbureter.



E. G. SHORTT.

GABBUBETEB.

APPLICATION FILED NOV. 27, 1912.

1,133,754, Patented Mar. 39, 1915.

WITNESSES E. G. SHORTT. GABBURETER.

APPLIOATION FILED NOV. 27, 1912.

1 1 33,75%, Patented Mar. 30, 1915.

2 SEEfiTS-SHBET 2.

WITNESSES MM EWmdg? UNITED STATES PATENT OFFICE.

EDWARD G. SHORTT, OF GABTHAGE, NEW YORK, ASSIGNOR OF ONE-HALF TO M. CLINTON MASON, 0F ROCKVILLE, CONNECTICUT.

GARBURETER.

To all whom it may concern:

Be it knowir that I, EDWARD G. SHOR'I'I, a citizen of the United States, residing. at Carthage, in the county of Jefferson and State of New York,- have invented certain newand useful Improvements in Carbureters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings,

and to the letters and figures of reference marked thereon, which form a part-of this specification.

This invention relates to new and useful improvements in carbureters, etc., the objectin view being to afford means whereby a supply of fuel and air, properly proportioned may be quickly introduced into. a combustion chamber, by manually operated mechanism whereby the effect may be produced similar to that obtained by the throttle valve of a locomotive.

The invention consists more specifically in the provision of a device of this character, in which means is provided for regulating the air passageway leading into a chambered coupling adapted to communicate with a combustion chamber, synchronously with the actuation of a fuel retarding device.

Another and essential object of the invention consists in the provision of means whereby the diameter of the passageway, through which the air and. fuel pass to the engine, may be increased or decreased by the movement of the lever-operated valve, thereby causing a variable passage for the inrushing air.

Another feature of the invention consists of means whereby, when the supply of fuel is cut off when it may 'be desired to allow the engine to operate while coasting, air may be drawn into the combustion chamber for the purpose of cooling the same without allowing any fuel to be drawn into the combustion chamber.

The invention consists further in the provision of a controlling device adapted to enl Specification of Letters Patent.

- Patented Mar. 30, 1915..

Application filed November 27, 1912. Serial No. 738,901.

of construction, combinations and arrangements of parts as will be hereinafter more fully descrlbed, shown in the accompanying drawings and then specifically defined 1n the appended claims.

panymg drawings, which with the letters of reference marked thereon, form a part of this application, and in which F1gure 1 is a central longitudinal sectional view through the device. Fi 2 is a sectional view taken on line 22 0 Fig. 1. Fig. 3 1s a sectional view taken on line 3-3 of Fig: 2. Fig. 4'is a side. elevation. Fig. 5 1s a top plan view. Fig. 6 is an end view, and Fig. 7 is a sectional view taken on line 7 7 of Fig. 1.

Reference now being had to the details .of the drawings by letter, A designates a both the hinged portion-of the casing and.

the opposite side wall of the latter, are provided with openings D for the admission of air to be supplied, suitably mixed with fuel, to the engine. The main chambered por- I 0 Q I V I illustrate the mvent1on 1n the accomtion of the casing forms a variable air pas sageway, communicating through an opening E, with the interior of said coupling a member B. Said opening, itwill be noted, is slightly contracted and has a beveled valve seat E formed in the mar 'nal edge thereof, and through which seat a el duct F passes. Cast integral with the casing are the spider arms G radiating from a central bearing G; A. valve stem H is mounted to have a longitudinal movement in said bearing and in an aperture formed in the end of, the casing and at one end of the stem is a valve I with a beveled circumference and provided for the purpose of controlling the passage of air and fuel, properly proportioned, through -the inlet openmg-communicating with the interior of the coupling member B.

Upon reference to Fig. 1 of. the drawings, it will be noted that the inner surface a of the wall of the coupling member Bis inclined or tapering as at B adjacent to the end of the casing to which said coupling the present invention, in that the diameter ver,

spring R which latter,

of the passageway controlled by the valve 1 may be increased or decreased gradually, accordingly as the valve is moved from or toward its seat, thereby formin means whereby the velocity of the inrus ing air:

may be maintained at nearly a uniform speed regardless of the speed of-the-engihe; By the provision of this gradually increasing diameter of the passageway, as the valve is ,unseated, the vacuum drawmg upon the: fuel and air is maintained in order to properly feed the air and .gas to the combustion chamber. v

The end of the valve stem is provided with a threaded opening I for the reception of the threaded shank portion of the screw 1 the head of which is ofgreater diameter than the projecting end of the valve stem in whichsaid threaded. hole is formed, and a coiled spring I is interposed between said head and a disk valve- I, which latter is normally held by the springI against the outer face of the valve I and normally closes the apertures I formed in said valve. The provision of said disk valve is to allow air to pass through the apertures I when there is a tendency for the disk valve to be drawn away from the face of the valve by suction force in the event of a vehicle coasting down a grade and when the valve -is seated to shut off the supply of fuel, the air which may pass through the apertures 1 being utilized for the purpose of cooling off the engine- Mounted loosely upon said valve stemis a resistance block K having lateral projections L and M, the former of which has'a series of rack teeth N thereon, in mesh with the teeth 0 of the lever P, which latter is pivotally mountedupon a pin Q. Said lemounted as shown and described, forms means for moving the resistance block against the tension, of the master coiled at one end fits over the projecting portion of the bearing supported by said spider arms, and its other end extends over .one end of a cylindrical portion of said resistance block, the purpose of said spring being to normally hold the valve seated.

Fixed to the valve stem is a flanged collar R against one end of which one end of the resistance block is held by said spring B when the valve is seated. A second-coiled angle to the valve spring R is fitted over said collar and bears against the flange at the end thereof, and

also over. a second flanged collar R which is loosely mounted on the valve stem. Said spring B, is much lighter than the spring R, and is normally held under tension by the latter.

Referring to Fig. 1 of the drawings, it will be seen that the oil duct F communi cates with a slightly tapering aperture J formed longitudinally inthe threaded spray bushing J whi is fitted in a hole having a threaded wal The projection M of the resistance block is split and is provided with threaded jaws for the reception of the threaded shank S of the retarding member tapering aperture or duct J, receives a conical shaped packing or gland J which is centrally apertured for the reception of the contracted cylindrical end of the retarding member. A washer J 3 is mounted upon the retarding member, and a coiled spring J bears between said washer and another washer J 5 upon the retardingmember. The washer J 5 is held by the spring J against a shoulder at the end of the threaded portion of the shank of the resistance member, the

spring J serving to compress said packing member and hold same to its seat.

Leading through the wall of the casing is a duct'T, which is in communication with a port T formed in the bushing J, and which ort T communicates with the longitudinal uct J therein.

in the drawings I have illustrated the usual float mechanism for regulating the flow of the fuel, the float chamber being designated by letter W, and W the float therein, a suitable valve W pivoted to the.

float, being adaptedito regulate the flow of the fuel from the duct X to the interior of the float chamber. .It will be understood however, that the float and chamber maybe dispensed with if desired, and the fuel pipe connected direct to the duct S when it is desired to introduce the fuel in any other manner. p

Projecting from the inner wall of the easing are the ribs Y, shown in Figs. 2 and 3 of the drawings, and which serve to guide the resistance block as it moves back and forth.

In operation, when the parts are assembled as shown and connected to a combustion chamber, the movement of the lever, which may be operated'through suitable connections convenient to the operator, away from the valve, will cause the resistance block to move in the opposite direction and against the tension of the spring R, thus allowing the lighter spring R, which normally is under tension to expand and move the piston stem longitudinally and unseat the valve. As the resistance block is moved toward the valve the retarding member is also moved therewith and tends to restrict the flow of the fuel through the fuel duct, it being understood that the greater the suction through the valve controlled end of the Venturi passageway, the more the resistance will be to the flow of the fuel, incident to the forward movement of the retarding member within the tapering duct of the bushing. This provision is made to guard against feeding an oversupply of fuel.

It will be noted upon reference to Fig. 1

of the drawings that the action of the valve I, relative to the tapering portion of the wall B of the coupling member B, will cause a variation in the diameter of the passageway through which the fuel and air pass to the combustion chamber and that, the farther the valve is moved away from its seat, through the medium of the lever P, the volume of the inrus'hing air will be maintained at a nearly uniform velocity, the varying speed of the air which is drawn through, incident to the vacuum formed within the engine, will vary accor ding to the suction and the capacity of the passageway, the. greater the'suction as the valve leaves its seat, the greaterwill be the speed of the air and a consequent accelerating movementwill be imparted to the fuel, the

passageway through which the fuelpasses.

being constricted as. the valve moves from its seat. By this provision in the controller, the vacuum stage intermediate the valve and the engine will be constantly maintained while the engine is in operation and the fuel will consequently be thoroughly atomized before reaching the combustion chamber.

. In the event of an engine with which the controller is equipped, going down anincline; when the valve is seated and the sup-' ply of fuel thereby cut off, any vacuum force which may be created within the .engine when in operation will cause the disk valve to be drawn away from the valve I under the tension of the spring I and air for cooling the engine will'be drawnthrouglh the apertures I and allowed to pass to t combustion chamber of the engine.

By the mechanism shown, there will be no spring resistance at .any time, the incoming air or fuel and in the event of there being a back fire, the valve will quickly seat independent of the resistance block. When the valve is seated the oil supply will be sealed.

By "the provision of a hinged side to the casing, a convenient means is afforded whereby access may be had to the interior 5. An apparatus" for of air and fuel to internal combustion enthereof for adjusting the retarding member.

What I claim to be new is:

1. An apparatus for controlling the flow of air and fuel to internal combustion engines, etc., comprising a chambered casing with an air passageway leading therefrom ter, a valve regulating said assageway, op-

and a fuel duct through the wall of the latposing springs, one norma y holding the of air and fuel to internal combustion engines, etc., comprlsmg a chambered casing with an air passageway leading therefrom and a fuel duct through the wall of the latter, a valve regulating said passageway, opposing springs, one normally holding the valve seated while at rest and sealing the flow of fuel, manually operated means for relieving the valve from the action of its closing spring to allow the other sprin to unseatthe valve, and means for retar g the flow of fuel as the valve unseats, as set forth. p

3.. An apparatus for controlling the flow of air andfuel to internal combustion engines, etc., comprising a chambered casing with a passageway leading therefrom, a portion of the wall of the latter forming a valve seat with an oil duct leading therethrough, said casing having a chambered portion, the inner surface of which flares at an angle to said valve seat, a valve, a spring normally holdin the valve seated to seal the flow of air and fuel when at I rest and means for moving the valve which coiiperat'es with the flaring surface of said chamber to maintain a substantially uniform flow of air and fuel as the valve moves toward or away'from its seat, as set forth.

4. An apparatus for controlling the flow of air and fuel to internal combustion'engines, etc., comprising a chambered casing with a passageway leading therefrom, a portion of the wall of the latter forming a valve seat with an oil duct leading therethrough, a valve, springs, one normally holding the valve seated when at rest to seal the flow of fuel through said passageway, means for relieving the valve from the action of its seating spring to allow the other spring to expandto unseat the valve, fuel-regulating mechanism, said valve being arranged to seat automatically under backfire and independent of the means employed forrelieving the valve of said seating-spring, as .set forth.

controlling the flow gines, comprising a casing which is chambered with an air passageway leading therefrom, a valve regulating said passageway, opposing springs, one serving to seat the valve, and the other tending to unseat the latter, a resistance block against which the valve seating spring bears, lever means for moving said block to vary the tension of the spring which bears against same,'a fuelre tar-ding device adjustably mounted upon a projection of,,the resistance block.

6. An apparatus for controlling the flow of air and fuel to internal combustion engines, comprising a casing which is chambered with an air passageway leading therefrom, the wall of the casing being apertured for the admission of air, a valve regulating the exit of said passageway, opposing springs, one serving to seat said valve and the other tending to unseat the latter, a resistance block against which the valve seating spring bears, rack teeth upon a projection of said block, a lever with teeth engaging said rack teeth, and a fuel retarding device fixed to the block.

7. An apparatus for controlling the flow of air and fuel to internal combustion engines, comprising a casing which is chambered with an air passageway leading therefrom, a valve regulating said passageway, opposing springs, one serving to seat the valve, and the other tending to unseat it, a resistance block against which the valve seating spring bears, rack teeth formed upon a projection of said block, a pivotal lever having teeth in mesh with said rack teeth, a fuel retarding device, having a threaded circumference adjust-ably held in a projection of said resistance block, and regulating the feeding of the fuel to be mixed with air.

8. An apparatus for controlling the flow of air and fuel to internal combustion engines, comprising a casing which is chambered with an air passageway leading therefrom, a valve regulating said passageway, opposing springs, one serving to seat the valve, and the other tending to unseat it, a stem to said valve mounted to move back and forth in suitable bearings, a resistance block movable upon said stem and against which block the valve seating spring is adapted to bear, a lever for moving said block, a fuel retarding device carried by said block and means for adjusting said retarding device.

9. An apparatus for controlling the flow of air and fuel to internal combustion engines, comprising a casing which is chambered with an air passageway leading therefrom, a valve regulating the flow of air and fuel through said passageway, a stem to said valve, a resistance block movably mounted upon said stem, a spring bearing between said block and casing and serving to seat the mounted upon said stem a spring bearing between the casing and said block, a collar fixed to the stem, a second spring' bearing betweenone end of the casing and said block, means for actuating the resistance block, a projection of the latter having a split portion with threaded recesses therein, a fuel retarding member having a circumferentially threaded part engaged by the walls of said threaded recesses, a bushing communicating with an oil duct, and in which bushing one end of the retarding member has a play.-

11. In an apparatus for controlling the flow of air and fuel to internal combustion engines, the combination with a casing. which is chambered with an air passageway leading therefrom, a spring actuated valve controlling said passageway, a fuel bushing mounted in the casing and communicating with an oil duct therein which leads through the seat of said valve, said bushing having a tapering duct therein a fuel port leading to the latter, a packing in the end of said duct of the bushing, a retarding member having a cylindrical" end movable through said packing and into said tapering duct, a spring bearing against said packing, and means for moving said retarding member synchronously with the regulation of said valve.

12. An apparatus for controlling the flowof air and fuel to internal combustion engines comprising a casing with a chambered portion having an air passageway, a valve seat in the wall of the latter, a valve adapted to contact with said seat, opposing springs, one normally holding the valve seat and sealing the flow of fuel and air and the other tending to unseat the valve, means for varying the tension of the valve closing spring to allow the valve to unseat, a coupling member having a chambered portion, the wall of which adjacent to the valve seat is tapering, affording means whereby, as the valve unseats, the space intermediate the circumference of the valve and said inclined surface will increase, as set forth.

13. An apparatus for controlling the flow of air and fuelto internal combustion en gines comprising a casing with a chambered portion having an air passageway, a valve 'seat in the wall of the latter, a valve adapted to contact with said seat, opposing springs,

one normally holding the valve. seat and sealing the flow of fuel and airand the other tending to unseat the valve, means for vary.- ing the tension of the valve closing spring to allow the valve to unseat, a coupling member fastened to said casing and having a chambered portion, the wall of which ad jacent to the casing is tapering and at anangle to the valve seat, as set forth.

14. An apparatus for controlling the flo of air and fuel to internal combustion engines, comprisinga casing with a chambered portion having an a1r passageway, an apertured valve regulating said passageway, op-

posing springs, one' normally holding the valve seated and sealing the flow of fuel and the other tending to unseat the valve, means for varying the tension of the valve closing spring and allowing the valve to unseat, and

a sprlng-pressed disk valve mounted upon .apertured valve, a screw fitted to the valve,

and a spring interposed between the head of the screw and the disk valve, as set forth.

In testimony whereof Ihereunto aflix my signature in the presence of two witnesses.

EDWARD G. SHORTT.

Witnesses:

W. W. SWEET, .LoRA SWEET. 

